public class demo19 {
    private static int count=0;
    public static void main(String[] args) throws InterruptedException {
        Object locker = new Object();
        Object locker1= new Object();
        Thread t1 = new Thread(()->{
            for (int i = 0; i < 5000; i++) {
                synchronized(locker){
                    count++;
                }

            }
        });
        Thread t2= new Thread(()->{
            for (int i = 0; i < 5000; i++) {
                synchronized (locker){
                    count++;
                }

            }
        });
        t1.start();

        t2.start();
        t1.join();
        t2.join();
        System.out.println("count="+count);
    }
}
